Valve mechanism.



J. E. WILLIAMS.

VALVE MECHANISM.

APPLICATION FILED AUG.15, 1911.

1,020,003, Patented Mar. 12, 1912.

n ngsjzs I z 2 /%1g1vr:m 164% 6% JAMES EDWARD WILLIAMS, 0F BESSEMER,ALABAMA.

VALVE MECHANISM.

Specification of Letters Patent.

Patented Mar. 12, 1912.

Application filed August 15, 1911. Serial No. 644,236.

To all whom it may concern Be it known that I, Jlurns EDWARD VIL- LIAMS,a citizen of the United States, residing at Bessemer, in the county ofJefferson and State of Alabama, have invented certain new and usefulImprovements in Valve Mechanism, of which the following is aspecification.

This invention relates to certain new and useful improvements in valvemechanism, and relates particularly to that type of valve mechanism usedin connection with direct acting engines such as are employed inconnection with the operation of rock drills, coal punching machines,power operated hammers, and the like.

The invention has for its object the provision of valve mechanism of thecharacter stated in which comparatively little travel is required forthe valve to fully open the ports for the admission to the cylinder ofthe power fluid, and in which the valves are disposed at right angles tothe longitudinal axis of the cylinder.

A still further object of the invention is to provide a valve mechanismof this character in which the valves are operated to move the same toopen position by direct contact with the piston, thereby insuring at alltimes a quick and positive movement of the valve to its open position.

The invention comprises, generally stated, a piston having inclinedfaces thereon together with a power fluid chest in which two verticallymovable valves are disposed, connected together within the chest by arocking or tilting lever, the valves extending at their lower endsthrough the chest and provided on said lower ends with inclined surfacesengageable with the inclined surfaces of the piston whereby the latterin its reciprocating movement alternately raises the valves so as toopen and close the ports leading to the cylinder.

In the accompanying drawings, Figure 1 is a longitudinal sectional Viewof my improved valve mechanism, and Fig. 2 is a horizontal sectionalview of the same.

Like reference numerals indicate like parts in each of the figures.

I have shown the piston 5 as mounted within a cylinder 6, shown withboth ends open, though it will of course be understood that one end willbe suitably closed, and the other end will have a suitable inclosurethrough which the rod of the piston will extend and work.

The device it will be understood may be operated with either steam, air,or any other suitable power fluid.

The power fluid chest 7 may be of any approved shape, the chamber 8thereof being closed at its outer end by a plate 9 through which extendsthe inlet opening 10, the motive fluid passing from the inlet opening 10to the chamber 8 through the passageway 11 provided therefor. ,In thechamber 8 of the chest are mounted two valves 12 and 1 1 respectivelymovable at right angles to the longitudinal axis of the cylinder. Thesevalves are substantially of the spool type, and work in ways or seats 15provided therefor in the walls of the chamber 8, and are preferablyprovided with the guides 16 extending longitudinally of the valves andsliding in grooves provided therefor in the walls of the chamber asclearly shown in Fig. 2 of the drawings The ways 15 open into thecylinder 6, and each valve at its inner end is provided. with aninclined face 17 which faces are engaged by the inclined faces 18provided on the piston 5. The valves intermediate their ends areprovided with circumferential grooves 19 forming passage-ways whichlead, when the valves are open, through ports 20 to the exhaust port 21leading from the chest 7. The valves near their outer ends are providedon their confronting faces with seats 22 which receive the headed end 23of a rocking or tilting lever 24. mounted to rock on a bolt 25 extendingtransversely through the chest 7.

The chest 7 has the main ports 26, 27 respectively leading to thecylinder at opposite sides of the piston 5. Branch passages 26, 27 leadinto the chamber 8, and branch passages 28, 29 respectively lead to theannular grooves 19 and ports 18, to the exhaust 21.

The cover plate 9 of the chest is provided on its inner face withflanges 30 which project into the chest a distance sufficient so thatwhen either valve is in the opened position, it will slightly overlapthe confronting face of the adjacent flange, and thus close off thespace above the valve from the motive fluid.

The operation of my improved valve mechanism it is thought will bereadily understood, by those skilled in the art, since it will beevident that when air, steam, or other motive fluid employed is admittedto the chamber 8, and with the parts in the position as shown in Fig. 1,the motive fluid will pass from the chamber 8 through ports 26 and 26into the cylinder 6 at the left hand end of the piston 5, sothat thepiston will be moved toward the opposite end of the cylinder. When suchmovement takes place, the inclined face 18 at the left hand end of thecylinder engages with the inclined face 17 of the valve 12, and thesupport for valve 14 having been removed due to the movement of thepiston, valve 12 is shifted outwardly, and valve 14: shifted inwardly.The outward movement of valve 12 shuts off the supply of motive fluidthrough port 26, and communication is established between the cylinderat the left hand end of the piston and the exhaust 21 through port26-and branch port 28. Valve 14 having been moved inwardly,communication is thus established from the chamber 8 through port 27 andport 27 with the cylinder at the right hand end of the piston so as toforce the piston in theopposite direction. On this latter movement, thevalves will again assume the position shown in Fig. 1 and motive fluidis again admitted to the cylinder at the left hand end of the piston.

It is to be noted that the movement of the valves is effected bypositive engagement with the piston, and that when it is desired to haveaccess to the chamber 8 for any purpose whatever, the removal of plate 9carries with it the projections or flanges 30, so

cylinder at opposite ends of the piston, of a pair of valves mountedwithin the chamber of said chest and movable therein at right angles tothe longitudinal axis of the cylinder, said valves having inclined innerends projecting into the cylinder to be engaged by the inclined faces ofsaid piston, said valves intermediate-their ends having peripheralgrooves and the chest wall having branch ports in constant communicationwith the inlet ports and with which the grooves are brought intoregistry as the valves are operated, a rocking lever mounted within thechamber of the chest and having its ends seated to work in recessedconfronting faces of the valves, and a cover plate for the chest. I

In testimony whereof I aflix my signature in presence of two witnesses.

JAMES EDWARD WILLIAMS. Witnesses:

GEORGE Ross, JIM. Ross.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. C.

